Gene duplication and relaxation from selective constraints of GCYC genes correlated with various floral symmetry patterns in Asiatic Gesneriaceae tribe Trichosporeae
Fig 2
Branch models used in PAML analyses.
(A) Schematic representation of the tree used in PAML. Arrowheads indicate the duplication event. Post duplication denotes all branches arising after the duplication event. Before divergence denotes the first branches following immediately the duplication event and post divergence denotes all subsequent branches. (B) One-ratio model, assumes equal ω across the tree. (C) Two-ratio model, assumes that ω changes pre- and post- duplication of GCYC1C and GCYC1D. Light blue line denotes same ω on branches post-duplication. (D) Three-ratio model, assumes ω varies before divergence (light blue lines), post divergence (dark blue lines) and outgroups (black lines). (E) Four-ratio model, assumes ω varies among branches before divergence (light blue lines), branches in GCYC1C clade (dark blue lines), branches in GCYC1D clade (dark blue triangle) and outgoups (black line).